基于数值模拟的核级管系中阻尼器削减

Reduction of Snubber in Nuclear Piping System Based on Numerical Simulation

针对核级管系中减少使用或不使用阻尼器的问题,以管道力学计算专业有限元分析软件为平台,采用数值模拟计算方法,对核级管道系统进行了大量的数值模拟计算,得到了管道应力、节点位移和支吊架反力。对比分析了阻尼器削减前后的计算结果,并根据计算结果改变部分支架的功能类型、调整支架布置位置以及用刚性支架代替阻尼器,使阻尼器削减后的管系力学性能仍然满足设计规范要求。

In order to remove the snubber in the nuclear-grade piping system,a numerical simulation method is adopted for the mechanical analysis of nuclear piping system based on the finite element program,and the piping stress,the displacements of nodes,and the support loads are obtained.The results are compared with and without the snubber,and the mechanical capability of the piping system still meets the design code through the changing of the function and position of supports as well as using the rigid supports according to these results.